Study on the Limit Penetration Level Evaluation Method of Distributed Photovoltaics Based on Large Sample Generation-Load Data

Abstract

The three-step rule of distributed photovoltaic (DPVs) connecting to a distribution network in the planning of practical photovoltaic projects is modeled in this paper. On this basis, a method based on large sample historical generation-load data is proposed to comprehensively evaluate the DPV limit penetration level of the low voltage–medium voltage (LV-MV) distribution network, which is the premise of DPV connection planning. Considering the fluctuations of generation-load data in time and space, the DPV limit penetration level of the LV network is evaluated based on kernel density estimation. On this basis, considering the uncertainties of DPVs connecting node schemes and connection capacity, the limit penetration level of DPVs continuously connecting to the MV network is evaluated based on the dichotomy method and stochastic simulation. Finally, the feasibility of evaluating the DPV limit penetration level by the proposed method is verified based on an example of a real distribution network, which is of great importance for the planning of a distribution network with high DPV permeability to continuously connect to DPVs.

Comprehensive Evaluation of Distributed PV Grid-Connected Based on Combined Weighting Weights and TOPSIS-RSR Method

“…Reliability, voltage quality, and economy are the basic requirements for grid power supply and the primary indicators for evaluating whether PV grid connection is reasonable. Considering the contribution of the PV power generation process to reducing pollutant gas emissions [10] and the practical absorptive problem, the environmental friendliness and absorptive capacity indicators are introduced into the traditional distribution network evaluation system. In contrast, a total of 17 secondary indicators are set up.…”

“…The distributed PV access to the distribution network is quantitatively evaluated from the operating cost perspective [9]. In reference [10], the distribution network's ability to consume distributed energy is assessed. However, the focus is only on the absorptive of the distribution network and no other aspects are considered.…”

Distributed photovoltaic hosting capacity assessment technology considering stable operation of distribution network

“…To assess distributed PV capacity, a distribution network simulation model can be built to continuously test its ultimate permeability within safe operating boundaries. An iterative optimization algorithm can determine the PV permeability limit under optimal configuration [3] . However, calculating distributed photovoltaic capacity for entire cities or provincial power grids involves significant dynamic modeling and simulation workloads or lacks universally applicable methods, both inefficient.…”